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Replacing the Key Battery for the Mercedes A-Class - B-Class
Model: Mercedes Classe A
W169
- Years 2004-2012
In this video, you will see how to disassemble and replace the battery in the remote key for the Mercedes A-Class, as well as the B-Class. First, take your remote in hand and start by removing the physical key from inside it. Next, insert the key into the slot to remove the rear plastic cover, accessing the battery compartment as shown in the video. At this point, remove and replace the battery with a new one of the correct type (in this case, a CR 2025 3V); insert it in the correct orientation and reassemble the cover and the key!
Updated on 14 May 2026 by ScegliAuto
Video tutorial
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